X‐ray diffraction in crystals of intermediate perfection. II. A treatment of LiF in symmetrical Bragg geometry
作者:
D. B. Brown,
M. Fatemi,
L. S. Birks,
期刊:
Journal of Applied Physics
(AIP Available online 1974)
卷期:
Volume 45,
issue 4
页码: 1555-1561
ISSN:0021-8979
年代: 1974
DOI:10.1063/1.1663457
出版商: AIP
数据来源: AIP
摘要:
In part I of this series we presented a method for the calculation of the integral diffracting power applicable to flat and curved crystals in symmetrical Bragg geometry. In the present paper we report a test of the above method. The integral reflection coefficient vs wavelength has been measured and calculated for an unusually perfect crystal of LiF and for a crystal of LiF rendered relatively imperfect by ``flexing''. Agreement was good. The mean mosaic block size and misorientation used in the calculation were deduced by using dislocation etch pitting. It is concluded that LiF is of Zachariasen's type I (i.e., extinction is primarily controlled by the mosaic block misorientation).
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